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1988 Fiscal Year Final Research Report Summary

Development of Techniques for Signal Validation in Nuclear Power Plants

Research Project

Project/Area Number 62460230
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field Nuclear engineering
Research InstitutionTOHOKU UNIVERSITY

Principal Investigator

KITAMURA Masaharu  Department of Nuclear Engineering Faculty of Engineering,Tohoku University, 工学部, 助教授 (00005422)

Project Period (FY) 1987 – 1988
KeywordsPlant instrumentation / Signal validation / Operational support / Diagnosis / Qualitative reasoning / Knowledge acquisition / Expert system / ファジー論理
Research Abstract

Signal Validation is a technique for cross-checking outputs of dissimilar sensors to obtain a single unambiguos indication for each physical parameter of critical importance. The Key issues in this technique are to acquire knowledge on cause-effect relationships between dissimilar signals, and to organize the knowledge in a form of intelligent knowledgebase. Following basic technical components have been developed to meet the need.
1. Technique for acquiring causal relationships.
2. Structurized knowledgebase for signal validation.
3. Consultation system for on-demand signal validation. The method of conventional qualitative simulationw as modified by introducing the fuzzy logic to provide a technique for satisfying the need of 1. This method allows us to characterize the causal relationships between signals in more precise manner. With the proper use of this method, we can obtain knowledge to be employed for cross-checking of dissimilar signals. The knowledge thus acquired should be related to the knowledge about plant structure for efficient signal validation. To store the two types of knowledge in an organized manner, a knowledgebase capable of handling both of the frame-representation and production rules was developed. The contents of the knowledgebase can be either prestored or generated whenever the prestored data are found to be insufficient. By using the knowledgebase as the main component, a protype of consultation system for on-demand signal validation was synthesized and implemented on a personal comuter. The usefulness of the developed system was demonstrated through simulator experiments.

  • Research Products

    (8 results)

All Other

All Publications (8 results)

  • [Publications] M.Kitamura: Artificial Intelligence and Other Innovative Computer Applications in Nuclear Industry,Plenum Press. 141-147 (1988)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.Kitamura: Proc.IMACS. 2. 450-452 (1988)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.Kitamura: Journal of Nuclear Science and Technology.

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.Takahashi: Jounal of Nuclear Science and Technology.

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.Kitamura: "Development of Knowledgebase System for Assisting Signal Validation Scheme Design." Artificial Intelligence and Other Innovative Computer Applications in Nuclear Industry, Plenum Press. 141-147 (1988)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M.Kitamura: "Evaluation of Signal Importance for Effective Implementation of Functional Redundancy" Proc. IMACS. 2. 450-452 (1988)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M.Kitamura: "Knowledge Acquisition and Coordination for Signal Validation" Journal of Nuclear Science and Technology.

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M.Takahashi: "Improvement of Diagnostic Procedure by Non-monotonic Logic" Journal of Nuclear Science and Technology.

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1990-03-20  

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